Dahlia, also known as Dali flower and Oriental chrysanthemum, is a perennial herb of dahlia in Compositae. The flowers are big and beautiful, with huge rod-shaped roots. It's not difficult to plant dahlias well. Just remember the following five "Taboos".
Five taboos of Dahlia cultivation
Five taboos of Dahlia Cultivation: shade
Dahlias like light and can't stand shade. In the cloudy and humid environment with insufficient light, the root system is weak, the absorption capacity decreases, the photosynthesis of leaves is low, the flower buds are poorly developed, the flowers are small and dark, and even difficult to bloom. If the serious lack of light lasts for a long time, the plant becomes slender and eventually dies. Therefore, the cultivation environment of Dahlia should be sunny in order to grow and develop normally and produce gorgeous flowers.
Taboo 2: fat
Dahlia has strong roots, large branches and leaves and large fertilizer demand. On the basis of preparing high-quality nutritious soil and applying sufficient organic fertilizer, the top dressing shall be applied frequently with light fertilizer and avoid applying thick fertilizer, so as to prevent dead branches and seedlings from burning roots.
Taboo 3: ponding
Dahlia root is a thick and juicy succulent root with strong air permeability. It requires a loose, breathable and well drained soil environment. If the soil hardens, waterlogging and hypoxia, it is easy to cause root rot and even death. However, dahlia has many leaves, large flowers and water consumption for transpiration, which requires a certain amount of water. If the leaves wilt due to high temperature drying, it should be watered immediately, subject to one-time thorough watering, and excessive watering should be avoided to prevent waterlogging; If the leaves wilt after the rain and the weather is fine, it is mainly caused by the damage of root hairs and the inability to absorb water, coupled with the water loss of leaf transpiration, it is not allowed to water immediately, but multiple leaf spraying can be carried out. After the soil is slightly dry, new roots are sent out and the absorption function is restored, the normal water management can be carried out. The principle is to keep the soil moist at ordinary times.
Taboo 4: high temperature
Dahlias like to be warm and cool, and avoid hot summer and high temperature. The suitable growth temperature is 20 to 25 ℃. Therefore, dahlia grows well in late spring, early summer, late autumn and early winter. From July to August, high temperature and heat, slow growth, poor flowering or stop flowering. Therefore, dahlia should pay attention to water supply and seedling protection in summer. After the flowers wither, the residual flowers and branches should be cut off in time, but they should not be cut dry immediately. After the heat in September, cut 2 to 3 sections at the base of the old stem to promote its germination of autumn buds, so that huge and bright autumn flowers can be opened after the end of October.
Taboo 5: more flowers
Dahlia has large flowers and too many flowers will lead to poor flower quality and short flowering period. Therefore, it is necessary to control the flowers properly. Start with seedling shaping. When the survival seedling is about 10cm high, leave 3 to 5 leaves to pick the heart and promote branching. During the branching growth period, the axillary buds are continuously erased and only the terminal buds are retained to promote the robustness of branches. After budding, except that one strong flower bud is reserved at the top of the branch, the excess flower buds shall be removed to ensure that the flowers are large, spectacular and gorgeous.
Avoid too many flowers